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44
Commissioning
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6.2
Setting Parameters via Parameter Channels
6.2.1
Introduction
A common data channel between the application and the I/O module is used to
exchange parameter sets acyclically and have them checked by the complex I/O
module. In order to access via all available interfaces of a fieldbus coupler or
fieldbus controller, the parameter channel is mapped to the existing register
model. Currently, the parameter channel can be operated with the following
interfaces:
•
via the control/status byte during the process data exchange
•
via the 2-byte process data interface (SPS interface)
•
via the parameter exchange for the corresponding fieldbus systems
(e.g. PROFIBUS-DP/DP-V1)
•
via the asynchronous serial interface of the fieldbus coupler/controller (e.g.,
for WAGO-I/O-CHECK, WAGO-I/O-PRO).
The parameter channel is mapped via registers 56 and 57 of the corresponding
table or the corresponding channel. The parameter data is stored word by word in
register 56, communication control is done via register 57. The structure for
registers 56 and 57 is described in the following sections.
6.2.2
Structure of the Register
6.2.2.1
Parameter Data (Register 56)
Register 56 contains the parameter data to be read or written. Depending on the
access type, either the I/O module (read parameters) or the fieldbus
coupler/controller (write parameters) will write data to the register.
Table 32: Parameter Data (Register 56)
Bit
Parameter
Bit
Parameter
PRM0 ... PRM15 Parameter data bit 0 to bit 15
7
6
6
PRM
PRM
PRM
7
6
5
15
14
13
PRM
PRM
PRM
15
14
13
WAGO-I/O-SYSTEM 750
750-464 2/4 AI RTD configurable
4
3
2
PRM
PRM
PRM
4
3
2
12
11
10
PRM
PRM
PRM
12
11
10
1
0
PRM
PRM
1
0
9
8
PRM
PRM
9
8
Manual
Version 1.0.1
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